Australia Powerball Quartile and Range Trend

Track the spread, distribution, and changes of winning lotto numbers over time. Identify clustering patterns and see how the number range widens or narrows across different draws.

Powerball Charts

Last 75 draws

From Apr. 18, 2024 To Sep. 18, 2025

Distribution, Spread, and Variability

In lottery analysis, the distribution, spread, and variability of winning numbers describe how the numbers are spaced out and how widely they differ from draw to draw. Sometimes they’re close together, sometimes they’re far apart. By examining measures such as quartiles, ranges, and number gaps, we gain insight into the balance and clustering of numbers rather than just their frequency. Quartiles show how numbers divide into lower, middle, and upper sections; the range highlights the gap between the smallest and largest values; and average gaps reveal how closely numbers group together. Studying these metrics is significant because it helps detect patterns of randomness, and spot unusual clustering

Below are the box plot of draw results, histogram of interquartile range, range, and number gaps. These charts provide a clearer statistical picture of how lotto draws behave over time. It covers the winning Powerball numbers from Apr. 18, 2024 to Sep. 18, 2025 , across 75 draws over time.

Box Plot of Lotto Draw Results Over Time

The chart below displays the statistical distribution, spread, or variability of winning Powerball numbers. Each box represents the middle 50% of numbers from the first quartile (Q1) to the third quartile (Q3), while the line inside the box marks the median winning number for that period. The “whiskers” extend to the minimum and maximum numbers drawn, and any points outside these whiskers indicate unusually low or high results relative to other draws. By tracking how the quartiles and range shift over time, the chart provides insight into the variability and spread of winning numbers, which can be used to visually assess the randomness and consistency of lotto draws.

Across all draws, the middle 50% of numbers were widely spread, indicating high variability. Overall, higher numbers tended to dominate the draws. Number distribution across ranges was generally balanced.

Histogram of Draw Interquartile Ranges

The histogram of interquartile ranges (IQR) focuses on the spread of the middle 50% of lotto numbers within each combination. By dividing these IQR values into bins, the histogram shows whether draws are typically compact or widely varied in their core distribution. This measure avoids extreme outliers and reveals the consistency of number spacing.

The histogram of interquartile ranges (IQR) of lotto draws reveals that the most frequent IQR interval is 12-15 with 22 occurrences, suggesting a strong clustering in this interval. In contrast, the least frequent IQR interval is 0-3, 28-32 with 0 occurrences, showing it is rarely observed. This indicates a noticeable concentration of draws around certain IQR intervals. Overall, the distribution shows clustering around specific IQR intervals, indicating that draws tend to gravitate toward these values.

Histogram of Draw Ranges

The histogram of ranges illustrates how spread out lotto numbers are within combinations. The range is the difference between the highest and lowest number in each draw. By dividing the ranges into bins, we can detect whether lotto draws usually produce tightly packed numbers or widely spaced ones. This histogram is useful in examining the consistency of number spread across many draws.

The most frequent range is 26-29 with 25 occurrences, suggesting that combinations with this level of spread are the most common. In contrast, the least frequent range is 6-9 with 0 occurrences, indicating that draws falling into this spread are relatively rare. This points to a clear clustering of draws around certain range values. Overall, the distribution of ranges tends to cluster in certain spread intervals, showing that draws are more likely to fall within these specific ranges.

Histogram of Number Clustering

The histogram of average gaps measures the typical spacing between consecutive numbers in lotto draws. Each bin represents a range of average gaps, showing whether numbers tend to cluster closely together or spread evenly across the draw. This histogram helps analysts detect patterns in number spacing, complementing other perspectives such as sums and ranges.

The histogram of average gaps between consecutive numbers in lotto draws reveals that the most frequent gap interval is 5 with 7 occurrences, suggesting a strong clustering in this interval. In contrast, the least frequent gap interval is 1, 3 with 0 occurrences, showing it is rarely observed. This indicates a noticeable concentration of draws around certain gap intervals. Overall, the distribution shows clustering around specific gap intervals, indicating that draws tend to gravitate toward these values.

Format Changes in Australian Powerball

The Australian Powerball lottery has undergone several format changes since its launch in 1996, each significantly impacting how number frequency analysis should be conducted. Below is the timeline of the Australian Powerball format changes:

Period	Format	Powerball
1996-2013	5 numbers from a pool of 45 (5/45)	1 number from the same pool of 45
March 1, 2013 - April 12, 2018	6 numbers from a pool of 40 (6/40)	1 number from a separate pool of 20 (1-20)
April 13, 2018 - Present	7 numbers from a pool of 35 (7/35)	1 number from a separate pool of 20 (1-20)

From 1996 to 2013, the game followed a 5/45 format, where players selected five main numbers from 1 to 45 and one Powerball from the same pool. In March 2013, the format changed to 6/40 + Powerball 1–20, meaning players had to choose six main numbers from 1 to 40 and a Powerball from a separate pool of 20. This shift altered the odds and made previous number frequency data less relevant. Then, in April 2018, the format changed again to its current form: 7/35 + Powerball 1–20. This increased the difficulty of winning the jackpot but introduced more prize divisions and larger potential jackpots.

How Australian Powerball Format Changes Affect Your Number Strategy.

These format changes have a direct impact on statistical analysis. Mixing frequency data across different formats is not advisable because each version of the game has a different number pool and probability structure.

For example, a number that appeared frequently in the 5/45 format may have done so due to higher individual draw probability, but that same frequency can be misleading in the 6/40 or 7/35 formats. Furthermore, changes to the Powerball pool—from 1–45 to 1–20—also significantly affect how often specific Powerball numbers appear.

Therefore, for meaningful analysis, it’s essential to treat each format as its own distinct dataset. Analyzing trends or frequencies should be restricted to results from within the same format period, especially if the goal is to inform number selection in the current game structure.